iiinova — where your digital self keeps evolving

Reposted by Kristoffer Magnusson

Magnus Johansson @pgmj.bsky.social · 28/09/2026

Our commentary "A Revolution in Search of an Estimand: On the Idionomic Proposal of Hayes et al. (2026)" is now available as a preprint: osf.io/preprints/ps... With @rpsychologist.com, @matti.vuorre.com, and Nils Hentati Isacsson.

osf.io

OSF

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Kristoffer Magnusson @rpsychologist.com · 24/09/2026

Thanks! Sure, the issue is more when the descriptive within-strata question accidentally turns into a "what if" question.

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Kristoffer Magnusson @rpsychologist.com · 11/09/2026

haha thanks, I also miss everything so can 100% relate

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Kristoffer Magnusson @rpsychologist.com · 11/09/2026

This is excellent! Highly enjoyed reading it

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Reposted by Kristoffer Magnusson

Josh Grubbs @joshuagrubbsphd.com · 28/08/2026

1/43 Ok folks, after much teasing and anticipation, I'm THRILLED to share our new paper in Annual Review of Clinical Psychology. Not gonna lie: I'm proud of this one, and I hope it makes an impact on the field (so please share!). A thread 🧵👇

To Be a Mental Disorder: Revisiting Behavioral Addictions
Joshua B. Grubbs, * Nicholas C. Borgogna, Beáta Bőthe, Hyoun S. Kim, Rory A. Pfund, Shane W. Kraus

Manuscript to appear in the 2027 edition of Annual Review of Clinical Psychology, this preprint may not
exactly represent the final printed copy.

Grubbs, J.B., Borgogna, N.C., Bőthe, Beáta, Kim, H.S., Pfund, R.A., & Kraus, S.W. (2027) To Be a Mental Disorder: Revisiting Behavioral Addictions. Annual Review of Clinical Psychology. 10.1146/annurev-clinpsy-061225-045608

Behavioral addictions have been recognized in various forms for centuries, yet only three—Gambling Disorder, Gaming Disorder, and Compulsive Sexual Behavior Disorder—are currently included in formal diagnostic systems. In the past decade, research on these conditions has expanded dramatically in both volume and methodological rigor, drawing on longitudinal, neurobiological, and cross-cultural designs and evolving into a truly global science. Even so, the field remains beset by unresolved controversies. Chief among these is a persistent tendency to import substance use disorder concepts—tolerance, withdrawal, and dependence—that lack conceptual and empirical support when applied to behavior. Related challenges concern the over-pathologizing of normal engagement and a reliance on confirmatory, self-report measurement of uncertain validity. We argue that advancing the field requires sustained funding, theory grounded in the disorders themselves, objective and intensive-longitudinal methods, greater diversity, and public health and regulatory attention to increasingly technological environments.

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Kristoffer Magnusson @rpsychologist.com · 26/06/2026

Yes, I'll have to revise that example. Thanks!

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Reposted by Kristoffer Magnusson

Lauren Forrest @laurenforrest.bsky.social · 25/06/2026

This blog post is a master class in (1) communicating a message so few articles (and analysts 😬) seem to fully understand/engage with and (2) the power of good data viz. Such a good and worthwhile read!

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Kristoffer Magnusson @rpsychologist.com · 26/06/2026

Oh you'll get another chance – unfortunately 😅

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Kristoffer Magnusson @rpsychologist.com · 25/06/2026

Mostly after failing to convince people in person using verbal means ;) And thank you!

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Kristoffer Magnusson @rpsychologist.com · 25/06/2026

Trying out Svelte for the first time here btw, really like it so far. Not sure why I didn't switch years ago.

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Kristoffer Magnusson @rpsychologist.com · 25/06/2026

New interactive blog! "Why Adjusted Regression Coefficients Are Less Descriptive Than They Look" rpsychologist.com/descriptive-...

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Reposted by Kristoffer Magnusson

Magnus Johansson @pgmj.bsky.social · 23/04/2026

I've made an R package for Bayesian Rasch #psychometrics with brms models, easyRaschBayes (on CRAN), implementing simple functions to create figures and tables with model fit metrics, etc. Attaching figures from conditional item infit, item-restscore with GK gamma, and the log-likelihood criterion.

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Kristoffer Magnusson @rpsychologist.com · 16/04/2026

No one:   Absolutely no one: Billion-dollar publisher in 2026: “We published the wrong version so our only option is to issue a retraction under your name”

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Kristoffer Magnusson @rpsychologist.com · 25/03/2026

I hope this is satire, but considering everything we're seeing in research, this feels more like an ominous preview

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Kristoffer Magnusson @rpsychologist.com · 25/03/2026

We are not ready for the next generation of research misconduct. "Our proprietary AI robots independently recreate any open source project from scratch. The result? Legally distinct code with corporate-friendly licensing. No attribution. No copyleft." malus.sh

malus.sh

MALUS - Clean Room as a Service | Liberation from Open Source Attribution

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Kristoffer Magnusson @rpsychologist.com · 11/03/2026

Great paper btw. "Towards a Clearer Understanding of Causal Estimands: The Importance of Joint Effects in Longitudinal Designs With Time-Varying Treatments" journals.sagepub.com/doi/10.1177/...

journals.sagepub.com

Sage Journals: Discover world-class research

Subscription and open access journals from Sage, the world's leading independent academic publisher.

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Kristoffer Magnusson @rpsychologist.com · 11/03/2026

If only... psychological researchers would use it like that and stop calling everything an effect

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Kristoffer Magnusson @rpsychologist.com · 10/03/2026

pretty sure the effect is even stronger the more obscure the author position is!

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Kristoffer Magnusson @rpsychologist.com · 10/03/2026

Someone must've done a systematic review on whether methodologists follow their own advice?

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Kristoffer Magnusson @rpsychologist.com · 10/03/2026

Methodologists' theoretical papers: "you MUST do X or your estimates are meaningless." Methodologists' empirical papers: [does not do X]

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Kristoffer Magnusson @rpsychologist.com · 06/03/2026

Love methods papers where the authors cover an estimator’s properties in painstaking detail, then add a footnote: “We assume X, Y, Z, which are unrealistic, but relaxing them is too complex” Thanks. I suppose it’s up to us applied researchers to deal with those gaps then?

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Kristoffer Magnusson @rpsychologist.com · 22/02/2026

Opened Bluesky for some USA vs Canada hockey banter. Everyone’s discussing R pipes. 😑

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Kristoffer Magnusson @rpsychologist.com · 28/01/2026

Novel, non-robust methods instead of something tried and tested? Sign me up! Sounds like a perfect fit for research

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Kristoffer Magnusson @rpsychologist.com · 28/01/2026

Not even daemonless or rootless containers? I thought they were natively supported by slurm atleast

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Kristoffer Magnusson @rpsychologist.com · 28/01/2026

Ironically, I was gonna demonstrate that a project that I archived using docker 7+ years ago still runs without issues. But I cannot remember where I stored the archive 🤷‍♂️ I guess I should've put it on a satellite.

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Kristoffer Magnusson @rpsychologist.com · 28/01/2026

No, everyone should not learn how to run their own Kubernetes cluster on arch. This should be handled centrally by the university when projects are archived.

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Kristoffer Magnusson @rpsychologist.com · 28/01/2026

Yes, archive OCI (Open Container Initiative) images for each project. Then we can simply docker / podman pull & run, without installing and fixing broken system or R package deps. This is much more future-proof and convenient than any R-only solution

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Kristoffer Magnusson @rpsychologist.com · 10/11/2025

Fun fact about LMMs: when you have missing data, power also depends on the correlation between intercepts and slopes. In the clip, I’m varying the amount of random slope variance.

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Reposted by Kristoffer Magnusson

Kristoffer Magnusson @rpsychologist.com · 07/11/2025

Just added to PowerLMM.js v0.3: Interactive power contour plots! Visualize how statistical power changes across parameter combinations. powerlmmjs.rpsychologist.com?view=contour

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Kristoffer Magnusson @rpsychologist.com · 07/11/2025

Try it out and let me know what you think, it is still a bit experimental

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Kristoffer Magnusson @rpsychologist.com · 07/11/2025

Just added to PowerLMM.js v0.3: Interactive power contour plots! Visualize how statistical power changes across parameter combinations. powerlmmjs.rpsychologist.com?view=contour

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Kristoffer Magnusson @rpsychologist.com · 30/10/2025

Wasn't that happy with how performance crashed as time points grew, so I dusted off some linear algebra to optimize the calculations. Benchmark showed a ~1Mx speedup using new implementation (with 100 time points) 😅

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Reposted by Kristoffer Magnusson

Matti Vuorre @matti.vuorre.com · 28/10/2025

🎉 @rpsychologist.com 's PowerLMM.js is the online statistics application of the year 2025 🎉 powerlmmjs.rpsychologist.com - Calculate power (etc) for multilevel models - Examine effects of dropout and other important parameters - Fast! (Instant results)

Screenshot of https://powerlmmjs.rpsychologist.com/

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Kristoffer Magnusson @rpsychologist.com · 29/10/2025

Let's make it happen. I'm ok with doing whatever I want for 1 week

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Reposted by Kristoffer Magnusson

Dan Quintana @dsquintana.bsky.social · 28/10/2025

Who’s gonna pay @rpsychologist.com to make a mega tool converting all g*power analysis types to an interpretable web tool like this?

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Kristoffer Magnusson @rpsychologist.com · 28/10/2025

v3 will recruit the participants for you

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